Allan Pettersson

A concerto for orchestra is a 20th‑century orchestral genre that treats the entire orchestra as the virtuoso "soloist." Instead of spotlighting a single instrument against an accompaniment, it rotates concertante roles among sections and individual players, showcasing color, agility, and technical brilliance across the ensemble. While it inherits structural rigor from the symphony and concerto grosso, the genre favors vivid orchestration, sectional solos, and a sense of theatrical display. Composers often use variation, fugal, or arch‑like forms to balance spectacle with architectural coherence.

Classical music is the notated art-music tradition of Europe and its global descendants, characterized by durable forms, carefully codified harmony and counterpoint, and a literate score-based practice. The term “classical” can refer broadly to the entire Western art-music lineage from the Medieval era to today, not just the Classical period (c. 1750s–1820s). It privileges long-form structures (such as symphonies, sonatas, concertos, masses, and operas), functional or modal harmony, thematic development, and timbral nuance across ensembles ranging from solo instruments to full orchestras and choirs. Across centuries, the style evolved from chant and modal polyphony to tonal harmony, and later to post-tonal idioms, while maintaining a shared emphasis on written notation, performance practice, and craft.